Counterbalance



PiCAPQD CQUNTERBALANCE Filed Feb. 8, 1927 INVENTOR.

ATTORNEYZ.

Patented Oct. 15, 1929 UNITED STATES PATENT OFFICE JOHN B. PICABD, OFTOLEDO, OHIO, ASSIGNOR TO THE NATIONAL SUPPLY COMPANY,

OF TOLEDO,'0HIO, ACORPORATION OF OHIO coUN'rERBALANoE Application filedFebruary 8, 1927. Serial No. 166,651.

. balancing loads periodically applied to the crank shaft through awalking beam to areciprocating pump rod, for example, or so that thecounterweights may be adjusted to remove any eccentricity of the mass ofthe crank and counter-weights, as during the oper ation of a sand reel.Other objects appear hereinafter.

Referring to the accompanying drawings, Fig. 1 is a side elevation ofthe weights connected together at one side of the sh aft; Fig. 2, an endelevation of Fig. 1 with a part broken away; Fig. 3, a side elevation ofthe upper weight; Fig. 4:, a side elevation of the lower weight with aportion'hrokcn away; Fig. 5, a section of Fig. 4: on the line -5 on Fig.4; and Fig. 6, a side elevation of the weights partially open.

On the drawing 1 is a shaft to which the weight 2 is keyed and on whichthe weight 3 is looselymounted so that itinay be turned on the shaft soas to lie at one limit on the same side of the shaft as the weight 2 or'so as to lie at the other limit substantially opposite thereto or so asto occupy positions between the said limits. The opposing surfaces ofthe weights within a small circle around the shaft are reduced inthickness to one-half the thickness of the weights beyond the saidcircle, whereby recesses 4 and 5 are formed. around the shaft at theinner ends. of the;

respective Weights 2 and 3. The reduced inner ends of the Weights 2 and3 are marked respectively 6 and 7. The end 6 of the weight N Qlies invthe'recess 51in the weight 3, and the v t near thereto,"for securingthe weights to gether.

life are providedw'ith. holes 8 which may ined indifferent angularpositions of the weights from each other, so as to receive bolts 9 bywhich the weight 3 may be secured to the weight 2. lVhen the movableweight is swung so as to meet the other at one side of the shaft, as inFig. 1, the weights may be additionally secured together by the bolts 10passed through the overlapping flanges 11 and 12 on the opposing edges13 and 14: of the weights 2 and 3.

The weight 2 has near the edge 13 the transverse holes 15, in any one ofwhich the crank pin 16 may be placed. The edge let of the weight 3 hasthe recess 17 to accommodate the end of the crank pin 16 and the nut 18thereon. That part of the weight 2 which has the holes and the crank pin16 constitutes a crank member.

The weights 2 and 3 have near their inner ends radial shoulders 19 and20 which engage and limit their angular movement when they are moved asfar as possible from their extreme eccentric positions as shown in Fig.1,

so that the mass of the weights is distributed to remove theeccentricity of the mass. The movable weight may he adjusted to any oneof certain angles with the other and secured in that adjustment byplacing the bolts 9 in alined holes 8 in the weights. The differentangular adjustments provide different eccentricities of the mass of theweights to suit the different conditions to be met. I claim- I 1. Thecombination of a shaft, a weight keyed thereto, a crank member on theweight, a Weightloose 0n the shaft, and means at the inner ends of theweights for rigidly connecting them together at selected angularrelations with'each other.

2'. The combination of a shaft, a weight keyed thereto, a crank membeion the weight,

a weight loose on the shaft, and bolts, ar-

ranged around the shaft and passed through both weights in a circlearound the shaft and 3. The combination ofa shaft, a weight keyedthereto and recessed entirely around the shaft, a weight loose on theshaft and recessed recess in the'other Weight, and an annular series ofbolts passed-through the said portions of both weights for securing theWeights togetherwhereby the weights may be secured together at selectedangular relation with each .other. 1

4. The combination of a shaft, a weight keyed thereto and recessedentirely around the shaft, a weight loose on the shaft and recessedentirely around the shaft, the portion of each weight adjacent to itsrecess fitting in the recess in the other weight, an annular series ofbolts passed through the said portions of both weights for securing theweights together, and additional bolts passed through the edges of bothweights when the weights are brought together at maximum eccentricity Iof their combined mass whereby the weights may be secured together atselected angular relation with each other.

'5. The combination of a shaft, a weight keyed thereto and recessedentirely around the shaft, a weight loose on the shaft and recessedentirel around the shaft, the portion of each weig t adjacent to itsrecess fitting in the recess in the other weight, bolts passed throughthe said portions of both weights for securing the Weights together, andadditional bolts passed through the edges of both weights when theweights are brought together at maximum eccentricity of their combinedmass whereby the weights may be secured together at selected angularrelation with each other.

6. The combination of a shaft, a weight keyed thereto and recessedaround the shaft, a weight loose on the shaft andrecessed around theshaft, the portion of each weight adjacent to-its recess fitting in therecess in the other weight, and an annular series of bolts passedthrough the said portions of both weights for securing the weightstogether at selected angular relation with each other.

7. The combination of a shaft, a counterweighted crank member unitedthereto and 7 having provision for attaching a pitman thereto, acounterweight member loose on the ,shaft andyadjustable angularlyaround'the shaft, and means securing the loosemember to the first memberat any one of a plurality of angular adjustments therewith.

In testimony whereof, I hereunto afiix my I signature.

JOH B. PIOARD.

